There was a post where a Fram tech stated 99%@16 microns for the Ultra in a reply to someone here. It makes sense they say
[email protected] microns based on that. IMO the 99 is 98.7 rounded, and the 99+ is a little extrapolation from that. Caused a whole lot of gladiator action on here too the 98.7.

FWIW based on tech email or whatever it was, I propose the Ultra is
[email protected] and the TG is fram officially stated
[email protected] I don't think it makes any difference in real use. I'm sure they will have it stated again the 99+, be patient all Ultra fans. IMHO and all that.